Various changes to the build system which allow building ScummVM in an external directory (and as such, allow you to have a debug, a profiling, and a release build from the same set of source files in parallel). Work in progress

svn-id: r12680

13 files changed, 21 insertions, 18 deletions

diff --git a/Makefile b/Makefile
index 8916b44038..926d73ca92 100644
--- a/Makefile
+++ b/Makefile
@@ -15,19 +15,22 @@ CP      := cp
 # Default compilation parameters. Normally don't edit these           #
 #######################################################################
 
+srcdir      ?= .
+builddir    ?= .
+
 DEFINES     := -DHAVE_CONFIG_H
 LDFLAGS     :=
-INCLUDES    := -I. -Icommon
+INCLUDES    := -I$(srcdir) -I$(srcdir)/common
 LIBS	    :=
 OBJS	    :=
 
 MODULES     :=
 MODULE_DIRS :=
 
-EXECUTABLE := scummvm$(EXEEXT)
+EXECUTABLE  := scummvm$(EXEEXT)
 
 # Load the make rules generated by configure
-include config.mak
+include $(builddir)/config.mak
 
 # Uncomment this for stricter compile time code verification
 # CXXFLAGS+= -Werror
@@ -44,10 +47,10 @@ CXXFLAGS+= -Wno-reorder -Wwrite-strings -fcheck-new -Wctor-dtor-privacy
 # Misc stuff - you should normally never have to edit this            #
 #######################################################################
 
-include Makefile.common
+include $(srcdir)/Makefile.common
 
 # check if configure has been run or has been changed since last run
-config.mak: configure
+$(builddir)/config.mak: $(srcdir)/configure
 	@echo "You need to run ./configure before you can run make"
 	@echo "Either you haven't run it before or it has changed."
 	@echo "If you cannot run configure, use 'make -f Makefile.noconf'"
diff --git a/Makefile.common b/Makefile.common
index c2447197ac..12e3ea0e26 100644
--- a/Makefile.common
+++ b/Makefile.common
@@ -120,7 +120,7 @@ MODULES += \
 CPPFLAGS:= $(DEFINES) $(INCLUDES)
 
 # Include the build instructions for all modules
--include $(addsuffix /module.mk,$(MODULES))
+-include $(addprefix $(srcdir)/, $(addsuffix /module.mk,$(MODULES)))
 
 # Depdir information
 DEPDIRS = $(addsuffix /$(DEPDIR),$(MODULE_DIRS))
@@ -171,4 +171,4 @@ endif
 
 # Include the dependency tracking files. We add /dev/null at the end
 # of the list to avoid a warning/error if no .d file exist
--include $(wildcard $(addsuffix /*.d,$(DEPDIRS))) /dev/null
+-include $(wildcard $(addprefix $(srcdir)/, $(addsuffix /*.d,$(DEPDIRS)))) /dev/null
diff --git a/backends/module.mk b/backends/module.mk
index 80030f0781..45a9206323 100644
--- a/backends/module.mk
+++ b/backends/module.mk
@@ -22,4 +22,4 @@ MODULE_DIRS += \
 	backends/midi
 
 # Include common rules 
-include common.rules
+include $(srcdir)/common.rules
diff --git a/base/module.mk b/base/module.mk
index d2c567e82b..9aad4e6bb0 100644
--- a/base/module.mk
+++ b/base/module.mk
@@ -17,4 +17,4 @@ MODULE_DIRS += \
 #base/gameDetector.o base/plugins.o: config.mak
 
 # Include common rules 
-include common.rules
+include $(srcdir)/common.rules
diff --git a/common/module.mk b/common/module.mk
index e67de1f56e..694128f8f6 100644
--- a/common/module.mk
+++ b/common/module.mk
@@ -20,4 +20,4 @@ MODULE_DIRS += \
 	common/scaler
 
 # Include common rules 
-include common.rules
+include $(srcdir)/common.rules
diff --git a/gui/module.mk b/gui/module.mk
index dc7e5a597a..018c0fd651 100644
--- a/gui/module.mk
+++ b/gui/module.mk
@@ -22,4 +22,4 @@ MODULE_DIRS += \
 	gui
 
 # Include common rules 
-include common.rules
+include $(srcdir)/common.rules
diff --git a/queen/module.mk b/queen/module.mk
index eaa678e5bf..4f52ba4e35 100644
--- a/queen/module.mk
+++ b/queen/module.mk
@@ -31,4 +31,4 @@ PLUGIN := 1
 endif
 
 # Include common rules 
-include common.rules
+include $(srcdir)/common.rules
diff --git a/scumm/module.mk b/scumm/module.mk
index da5d148120..fd62437a64 100644
--- a/scumm/module.mk
+++ b/scumm/module.mk
@@ -76,4 +76,4 @@ PLUGIN := 1
 endif
 
 # Include common rules 
-include common.rules
+include $(srcdir)/common.rules
diff --git a/simon/module.mk b/simon/module.mk
index c3724794d0..9b3677995f 100644
--- a/simon/module.mk
+++ b/simon/module.mk
@@ -22,4 +22,4 @@ PLUGIN := 1
 endif
 
 # Include common rules 
-include common.rules
+include $(srcdir)/common.rules
diff --git a/sky/module.mk b/sky/module.mk
index 55be926baf..2370eb404b 100644
--- a/sky/module.mk
+++ b/sky/module.mk
@@ -35,4 +35,4 @@ PLUGIN := 1
 endif
 
 # Include common rules 
-include common.rules
+include $(srcdir)/common.rules
diff --git a/sound/module.mk b/sound/module.mk
index 859a8b9975..61bf20f658 100644
--- a/sound/module.mk
+++ b/sound/module.mk
@@ -20,4 +20,4 @@ MODULE_DIRS += \
 	sound
 
 # Include common rules 
-include common.rules
+include $(srcdir)/common.rules
diff --git a/sword1/module.mk b/sword1/module.mk
index 686ed9008f..1c2d01580e 100644
--- a/sword1/module.mk
+++ b/sword1/module.mk
@@ -28,4 +28,4 @@ PLUGIN := 1
 endif
 
 # Include common rules 
-include common.rules
+include $(srcdir)/common.rules
diff --git a/sword2/module.mk b/sword2/module.mk
index e552165c23..784f541fcc 100644
--- a/sword2/module.mk
+++ b/sword2/module.mk
@@ -48,4 +48,4 @@ PLUGIN := 1
 endif
 
 # Include common rules 
-include common.rules
+include $(srcdir)/common.rules